Screening apparatus.



PATENTBD NOV. 29, 1904.

S. R. STILL.

SCREENING APPARATUS. APPLICATION FILED sBPT..24, 190s.

N() MODEL.

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No. 776,269. Patented November 29, 1904.

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STANLEY R. STILL, OF CARLISLE, PENNSYLVANIA, ASSIGNOR TO THE PENNSYLVANIA CLAY COMPANY, A CORPORATION OF NE'W JERSEY.

SCREENING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 776,269, dated November 29, 1904.

Application filed September 24, 1903. Serial No. 174,408. (No model.)

T @u wlwmf t 777/562/ @0W/GWW which allows the finest particles of the clay 5o Be it known that I, STANLEY R. STILL,aciti and the water in which it is suspended to pass Zen of the United States, residing at Carlisle, through the screen in the box A, while the Cumberland county,l State 0f Pennsylvania, larger particles of grit, silica, and other delehave invented a new and useful Improvement terious matters pass across the screen and off in Screening Apparatus, of which the followfrom the lower end thereof. To secure the 55 ing is a specification. best results in the separation of these finest My invention consists of improvements in particles of an even grade, it is obvious that screening apparatus of that class employing ythe inclination of the silk screen should be a substantially upright screen of fibrous mathe same throughout-thatis to say, the screen terial, and has for its object to provide a conthroughout should be in as near the same 6o struction by which the eflicicncy of the screenplane as it is possible to secure it in view of ing operation is increased. the nature ofthe material of' which it is formed My invention further consists of the feaand the use to which it is subjected. To secure I5 tures of construction hereinafter fully dethis end, I support this screen B from within.

scribed and claimed. In a screen of this construction it is usual to 65 Figure 1 is a front elevation of a screening employ transverse deilectors F to lead the maapparatus constructed in accordance with my terial suspended in water that passes through invention. Fig. 2 is avertical section thereof, the screen away from the inner face thereofl 2O taken on line .fc at intervals; but even with these transverse Similar letters of reference indicate corredeflectors it has been found that the screen 7o spondlng parts 1n the figures. bulges inwardly between each pair of deflec- Referring to the drawings, in the class of tors F, so as to form a plurality of concave screening apparatus to which my invention surfaces extending across the front face of' ,25 relates a box A is employed, over the one open the screen. This of course makes the angle side of which is stretchedascreen B, of fibrous of the screen just below a deflector difler- 75 material` preferably silk of the finest mesh. ent from the angle of the screen just above At the lower end of this boX is an outlet-port the defiector next below, which causes a 'dif- C, communicating with the outlet-pipe D. ferent grade of material to pass through these The material to be screened is fed thereto sus portions of the screen of different angularity.

pended in water by means of a feed-pipe E, To overcome this,"I employ upright supports SO extending transversely across the uppern end G, extending between the deiiectors F from of the screen and having a plurality of small the upper to the lower end of the screen, the openings, so as to supply the material across same being preferably disposed parallel at the entire face of the screen.` Except for the intervals throughout the screen with their interstices through the fibrous screen and outfront edges in the same plane. These front let-port C the boXA is closed, and the screen edges being sharp do not reduce the screen B stands in substantially an upright position, area, yet serve to maintain the screen B in being preferably a little inclined, with the practically the same plane throughout. Be-

lower end in advance. sides serving to hold the screen in practically Although it is obvious that a screen of this the same plane I employ these upright supclass can be employed in separating and ports for another purposenthat is, to deiicct screening various materials and in different the path of the water and suspended material arts, it is especially applicable in the art of as it crosses over the face of the screen. By

45 separating clay. In this art the crude clay doing this the material suspended in water is and water are mixed to form slip, and after kept upon the face of the screen a longer pethe very coarse particles have been removed riod than if it passed in a straight path, so the slip is supplied by the pipe E to the face that a greater opportunity is afforded the of this upright screen of fibrous material, finer particles of clay to pass through the screen. These means for deiiecting the passage of the water and suspended material can be variously arranged, and as a convenient embodiment I have selected these supports G, which are set in zigzag fashion, which obviously will cause the water and suspended material to pass in zigzag path down the front face of the screen.

Although the longitudinal deiiectors of the supports Gr are shown as arranged in zigzag fashion, yet it is understood that my invention is not limited to this specific circuitous arrangement, as others may be employed so long as such arrangement causes the material passing across the front face of the screen to pass in a deflected or circuitous path, that the path in which it passes across the front face of the screen is greater than if it passed directly from top to bottom in a straight path.

Having` thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. An upright screen of fibrous material, having means situated at the back thereof for deflecting the path of the material passing' across the front face thereof in combination with means for feeding over the face of the screen a thin stream of liquid containing such material,

2. A screen of fibrous material, provided With transverse and longitudinal defiectors set at intervals in contact with the bach thereof in combination with means for feeding over the face of the screen a thin stream of liquid containing the material to be screened.

3. An upright screen of librous material, having longitudinal deflectors in contac't with the back thereof for deflecting the material passing over the front face of the screen in combination with means for feeding over the face of the screen athin stream of liquid containing such material.

4. A screen of fibrous material, having longitudinal circuitous defiectors in contact with the back thereof in combination with means for feeding over the face of the screen a thin stream of liquid containing the material to be screened.

5. A screen of fibrous material, having longitudinally-disposed zigzag deflectors in `contact with the back thereof in combination With means for feeding over the face of the screen a thin stream of liquid containing the material to be screened.

6. A screen of fibrous material havingmeans in contact with the back thereof for causing' the material to be screened to pass across the face thereof in a circuitous path, in combination with means for feeding over the face of the screen a thin stream of liquid containing such material.

7. An upright screen of fibrous. material having transverse deflectors at the back thereof and diagonally-disposed supports between said deliectors, said deiectors and said supports being in contact with the back of said screen in combination with means for feeding over the face of the screen a thin stream of liquid containing the material to be screened.

8. An upright screen of fibrous material having transverse deiiectors at the back thereof and zigzag supports between said deflectors, said deflectors and said supports being in contact with the back of said screen in comb-ination with means for feeding over the face of the screen a thin stream of liquid containing the material to be screened.

9. `An upright screen of fibrous material having transverse deiiectors at the back thereof and a plurality of parallel zigzag supports between said deiie'ctors, said deliectors and said supports being in contact with the back of said screen in combination with means for feeding over the face of the screen a thin stream of liquid containing the material to be screened.

STANLEY n. sriLL.

Witnesses:

JOHN A. WTIEDERsHnrM, C. D. MGVAY. 

